Product Features Constructed from high-quality stainless steel, ensuring durability and longevity. Two options available: with top wire and without top wire, to suit various needs. Enhanced gear groove depth and optimized teeth spacing for more precise and stable extrusion, resulting in superior printing performance. Compatible with 1.75mm filament, catering to a standard size for most 3D printers. Safety Notice: These 3D printer accessories are small; keep out of reach of children. Specifications Material: Stainless Steel Type: With the top wire / Without the top wire (Optional) Direction: Right Hand Shape: Ring Gear Processing: Die Casting Standard or Nonstandard: Standard Tooth Profile: Helical Gear Package Dimensions: 6 x 5 x 1 cm (2.4 x 2 x 0.8 in) Package Weight: 3.5 g (0.1 oz) Package Includes 1 x Upgrade Dual Drive Gear